Operating mechanism for furnace-valves.



J. W. SEAVER.

OPERATING MECHANISM FOR FURNACE VALVES.

APPLICATION FILED OCT. 17, 1907.

928,403. Patented July 20,1909.

3 SHEETS-SHEET 1v A TTORNE Y8 I wwmwl J. W. SHAVER.

' OPERATING MECHANISM FOR FURNACE VALVES.

APPLICATION FILED 00T.17, 1907.

Patented July 20, 1909.

3 BEEETSBHBET 2.

J. W. SHAVER, OPERATING MECHANISM FdR FURNACE VALVES.

APPLIOATIOIII'ILBD OUT. 17, 1907. 928,403. Patented July 20, 1909.

' assume-51mm s.

WITNESSES:

"wan/mg ATTORNEYS" UNITED STATES eagrnnr o TFICE.

JOHN W. SEAVER, OF CLEVELAND HEIGHTS, OHIO, ASSIGNOR OF ONE-HALF 'IO THE GARRETT- OROMW ELL ENGINEERING COMPANY, A CORPORATION OF OHIO.

OPERATING MECHANISM FOR FURNACE-VALVES.

Specification of Letters Patent.

Patenceaaiii 20, 1909.

Application filed October 17, 1907. Serial No. 397,824.

To all whom it may concern:

Be it known that I, JOHN IV. SEAVER, a citizen of the United States, residing at Cleveland Heights, in the county of Guyahoga and State of Ohio, have invented a certain new and useful Improvement in Operating Mechanism for F urnace-Valves, of which the following is a full, clear, and exact description. i I

- This invention is especially adapted for use in operating the reversing valves of re generative gas furnaces, and is shown in the drawings arranged for this purpose.

The object of the invention, as an entirety, is to permit one motor running continuously in one direction to properly operate all of the valves in proper sequence, and in such manner that, without any attention from an operator, the valves, after they have moved a definite and safe distance in either direction, will reverse their direction of movement.

Another object of the invention isto provide eflicient means for operating each pair of reversing valves so that the closed valve will not be moved from its seat until the open valve has been seated.

The invention also provides cheap and eflicient mechanism for properly controlling valves of the sort specified.

In the drawing, Figure 1 is a sectional plan view of a regenerator gas furnace equipped with the present invention in a satisfactory form,- said view being taken in a plane indicated by line 1-1 onFig. 2. Fig. 2 is a vertical sectional view' in the plane indicated by line 2-2 of Fig.1. Fig. 3 is a sectional view in the plane indicated by line 3-3 on Fig. 1,- showing particularly the mechanism for reversing the direction of rotation of the drum carrying shaft. Fig. 4 is a view of another form of mechanism which may be substituted for that shown in Fig. 3. Fig. 5 is a view of another form of mechanism which may be substituted for the mechanism shown in the other figures for taking in and paying out the valve operating cables. I

Referrin to the parts by letters A A represent the two gas regenerators, and B,

. B represent the two air regenerators of an ord nary regenerative gas furnace. The two gas valves are indicated by C, C; and the chimney valves for the gas regenerators are indicated by D, D. The air valves for the adjustable by means of a screw S.-

and the two chimney valves for the air regenerators are indicated by F, F. These valves which may be of any suitable form are exemplified in Fig. 2, which shows the gas valve G and the associated, chimney valve D of the gas regenerator A. Each valve, as shown, is a heavy conical valve of conventional puppet form, and each, when of this form, has an upwardly extended stem, exemplified by the stems 0 and d in Fig. 2. Sheaves J, J are respectively mounted in the yokes K, K, which are ivotally connected with the upper ends of t ese valve stems.

A weight is associated with each valve, which weight is not as heavy as the valve. As shown in Fig. 2, the weight H is associated with valve 0, and the weight I is associated with valve D; and these weights are respectively suspended from sheaves h and 2'. Means are provided for limiting the upward movement of each weight, the means shown being a cable P of the requiredlength, which is secured to the under side of each weight at (pne end and to a fixed point at its other en R. Two cables M and NY are wound 1n op.- posite directions upon this drum. The cable M goes from the drum over suitable guide sheaves, illustrated by sheaves 1, 2, 3 and 4, being looped down between sheaves 2 and 3 and between sheaves 3 and 4. In one loop the sheave i of the weight H is hung and in the other loop the sheave J of the valve C 1s hun One end of the cable M is anchored. Pre erably it goes under a sheave 5, and s connected with a block S, which is vertir iatllly 1s anchor connection permits the effective length of the cable to be readily ad uSted so that it will operate in the required manner.

Cable N goes over the guide sheaves,' 11- lustrated by sheaves 6, 7 8 and 9,-be1ng two air regenerators are indicated by E, E, a

- A drum 7' is attached to a rotatable shaft looped down between sheaves 7 and 8 and between sheaves 8 and 9. In one of these loo s the sheaves of the weight I is hung, an in the other "loop the sheave J of the taken in, the first efi'ect is the valve C Will. be lifted, and

consists of a pinion those which have been mentioned. In practice, one anchor block as Q will serve for the cables of all of the gas valves. Another anchor block, as S, will serve for all of the cables of the chimney valves; and the third anchor block, as 0, Will serve for the cables of all of the air valves. WVith the several cables connected as described with these three anchor blocks, it will be easy to adjust the valves to the various conditions of use, viz., variation in atmospheric conditions, and richness of gas, etc. It will be understood that these adjusting devices may be located at any convenient point,bccau se the cables may be made of any required" length and may be guided by suitable sheaves.

To operate the valves the drum '1" is turned so as to take in the cable associated with the closed valve, and to equall pay out the other cable. As one cable for example) is to lift the weight H, because the weight is lighter than the associated valve C. At the same time, the

cable N is being paid out and this permits valve D to close, which it does'because it is heavier than the associated weight I. The Weight H goes up until its further movement is checked by the cable P, at which time valve D has reached its seat. As the drum 1- continues to rotate after this hast-a ken place, the weight I will go down.. By reversing the direction in which the drum 1 turns, the valve D will be caused to seat itself and after this has taken place, the valve C Will be lifted.

It will be understood that the pairs of valves, C D, E F, E F, will be associated with similar controlling mechanism, and that the cables which form part of said mechanism will be wound in the manner described on drums 1- and 1" on shaft R. The cable associated with the valves C and D may be wound upon drum 1". The cables associated with valves E, F, and E F may be wound upon drum 7'.

It is obvious from the fore oin descri tion that one drum shaft g g p R, if turned first in one direction asuitable amount, and then Wlll operate all of the the opposite direction, valves of the furnace in proper sequence.

The shaft may be driven by a suitable motor, as, for example, by an electromotor T, which ma be connected with the said shaft by a suitable train of mechanism. In order, however, to control the movement of the valves sothat they cannot be moved too far in either direction and therefore injure the apparatus, mechanism is provided by which the rotation of shaft R will be automatically reversed, while the, motor con tmues to run in one direction. A variety of mechanism can be employed for this purpose. As shown in Fig.3, this mechanism 1' secured to shaft R,

and a reciprocating rack bar U which may be reciprocated by any suitable mechanism,-

as, for example, the crank V and pitmen 2-.

In. Fig. 4 the rack bar U is connected with two opposed hydraulic rams Z, Z, of ordinary construction.

Fig. 5 shows mechanism by which the shaft R and its drums may be dispensed with, and the cables M and N taken 1n and paid out in the required manner. This mechanism includes a hydraulic ram X common tot-wo opposed cylinders Q m, and suitable sheaves w, 10 carried by this ram. The cables M and N will be anchored at their ends and will pass in opposite directions around these two sheaves, and will then be guided by suitable sheaves toward the valves.

It will be understood from the foregoing description that the invent-ion herein shown may be embodied in various specific forms, and that numerous changes may be made in the specific embodiment shown. Such changes are not to be regarded as a departure from the invention as defined by the claims.

Having described my invention, I claim:

1. The combination of a set of valves and mechanism including cables for opening and closing them, winding drums for said cables, a motor, and automatic mechanism intermediate of said motor and drums for turning the drums first in one direction and then in the other indefinitely.

2. The combination of a lifting valve, a weight, and means for limiting the upward movement of said weight, with suitable cable guiding-sheaves, a cable going over said sheaves and having two depending loops, a

sheave connected with the weight and hung in one of said loops, a sheave connected with the valve and hung in the other loop, and mechanism for taking in and paying out said cable.

8. The combination of a pair of lifting valves, a pair of associated weights, means limiting the upward movement of said weights, and sheaves carried by said weights and valves, with cable guiding sheaves, two

cables going over said sheaves and each having two dependingfloops,one valve and its associated weight being suspended by their" sheaves inthe loops of one cable, and the other valve and its associated weight being suspended by their sheave in the loops of the other cable, and means for taking in one cable and simultaneously paying out the other. i

4. The combination of a pair of lifting valves, a pair of associated weights, means limiting the upward movement of said weights, and sheaves carried by said weights and valves, with cable guiding sheaves, two

cables goingover said sheaves and each having two depending l oops,one valve and its associ ated weight belng suspended by their sheaves 1n the loops of one cable, and the other valve and its associated weight being suspended I cable, each cable being anchored at one end, a drum on which the other ends of said cables are wound in opposite directions, and mechanism for turning said drum in opposite directions.

5. The combination of a pair of lifting valves, a pair of associated weights, means limiting the upward movement of said weights, and sheaves carried by said weights and valves, cable guiding sheaves, two cables going over said sheaves and each having two by their sheaves in the loops of the other depending loops,*one valve and its ass0ci ated Weight being suspended by their sheaves in the loops of one cable, and the other valve and its associated weight being suspended by theirsheave in the loops of the other cable, each cable being anchored at one end, a drum on which the other ends of said cables are wound in opposite directions, and mechanism for turning said drum a definite amount in one direction and then a like amount in the opposite direction indefinitely.

6. The combination of a pair of lifting valves, a pair of associated weights, means limiting the upward movement of said weights, and sheaves carried by said weights and valves, cableguiding sheaves, two cables going over said sheaves and each having two depending loops,--one valve and its associated weight being suspended by their sheaves in the loops of one cable, and the other valve and its associated weight being suspended by their sheave in the loops of the other cable, adjustable anchor block to which the ends of the cables are respectively connected, a drum on which the other ends of said cables are wound in opposite directions, a

pinion connected with said drum, and a reciprocating rack bar engaging with said pinion, and mechanism for reciprocating said rack bar.

In testimony whereof, I hereunto aiiix my signature in the presence of two witnesses.

JOHN w. SEAVER.

Witnesses:

E. B. GILGH'RIs'r, E. L. THURSTON. 

